Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3641b6d3983ae431326e18cd1b8decabde78d1b39575e40d0f1a5ad7aee71dac' 
  AND token = '/4tRZIpV/I0XrxA4N8azpvV5KfaL5PiZb+e14MI5IqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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