Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ceb6e5ccc8e07d29cd2de96a23ea3892bc3ce72c869dd0c2bc39050ee244151a' 
  AND token = 'DOcdp2AZCgYaks4/gxHxngsV02CSOSDMlRnCnqNINuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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