Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97ea7116b83313462d5ed88c165efaba9c92eb9cb04381a46089fad993271a31' 
  AND token = '2GhCn6gFFbnIvaQfWQs0PJHbQYuF+o9xDJkSuVdMwuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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