Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be26f2cda77d89c9771475b2d04279b6c0e1176b6ada335a7b223d0633b8981e' 
  AND token = 'GjYJBaXILSgzGAF1ENFbCfGWGbLBkeACJmCv2zrgTgQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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