Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea20a1461bf96da8a0ece838224adfbec989bf91a0d6dc62580eb0068e2da02f' 
  AND token = 'qF5kxt59bUQB3WZwBnGD2t2e7TX9TQ9WpS2o+4mqGOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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