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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '605c07a764b5140060814f8859f6cff7396ffd756934e0fad1cb265d5620e58b' 
  AND token = 'wM25Qt2xGIG7d8jyA0TNHaaROJpzSwV09q2xPIj10E0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}