SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c97ba6f45c92723f6f23578ef8988640c9a577673ca7160746ba2ca7df1a8f1' 
  AND token = 'vWIkPGGJobrLNqdlHFgOz/NwRPtoCLYfXDjGECrnJ5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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