Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52fa4f72e810515738b3c5b8a44f2c111c3201cbdaf50c9de5b4216a747f62b0' 
  AND token = 'Vt3aGhyC5t4MBlMbYQ2lJl0w2MhZW3HY1AzuljO5fkg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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