Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11ca1caf2eaf5a9da75cf416fc6ca2e7bd2687ae91a430b2a2b79185bdb39ada' 
  AND token = 'FQdihAb/nQ3QNoLmojkFCnHtwlIxbX1PD7ZIJ1XNNlQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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