Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '788243c8146ca1e7a69e6eb1f1ff27c10a105635cb3f7db4de71ca1b1e0b9556' 
  AND token = 'NNHMa3YX57UhodH0j4knD/eziErcWOqe/BaTlJPkSDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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