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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ee540e2fe6aea0406fa43cb065e83918b779adc67306618cfb1deb949c77ce0' 
  AND token = '9pnLkXO/D0XI+ljeteaqXQ7mVpLNnEr37s927ACJrPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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