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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fa64f1f80743ae41c7dcc246989eab7ec25e7f896c8eceac504471dcb4ec8f6' 
  AND token = 'Iq5aEmxb8K0QH66hBcueJwHVwY79Zf6HM5nJh14emM0=' 
  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"
    }
  }
}