Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9da5174a4f17e484a354abd4064ef4331db922bf4e84c85e196b7610807b1d07' 
  AND token = '6/qs72AmF4J9WolmgPJAomFwtsOdlGyq5UJEWa6zZbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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