Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5925fc5a795020edec3fb052257d53968bcbc157e5506a154417c9560c7db57' 
  AND token = '1rSvTRhuOJrNMQ3zwhwWvGH6DPZIP3NWF/6yAYq294E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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