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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60bd58d1afe3c4bd67062f49f41645f02f0f9c650f0c8424e853fefc2cede6cf' 
  AND token = 'XYtf0+4zrLiXnqXs0H963bRakJLZWQ5++mh6brUrtTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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