Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caaaa8eab7e6422bea913997bbc76df9ec6750bc6131d88ee5cf7e262de26b6c' 
  AND token = 'SR5r8IpMV0M4QOk5qIFBO4gIurpwnZ5y5tVcYb0Hdbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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