Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc0223cf647c838a5042664d3a37d66ba1888bb4a021755db7949496b3d6788c' 
  AND token = 'Qpvu6TCi7XJv8BJ8PvQh730YPKU4VJnEBLdlAlI6ch4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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