Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54361ba9030d03965fac0ff7122b1c338c2c843dabcb4c15a173e5840bd28db0' 
  AND token = 'U/93j74s198AtXOmngP+bxIWWLLq4rJ0euXXzBfOFC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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