Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fa76ece21903e6619224221677a0cdf955577d91f6f244cb589cb228715d17c' 
  AND token = 'uaTbLJNBXQSmaEiiDxvv3jnEBO0f2vPFQAVjBCyp1e8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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