Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb292fb5aa1c98c98a72c57a51ec63fdf8654072514f9de0b82ebb6607a34389' 
  AND token = 'my20VO+UDgH6lq3DKrs8JaGTq6V3b68x5YtRiXXrTRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}