Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a7ab63ddf7faa1685786b89bf522d8105cdcde0aadd8871c320ecd5f3d0a4fd' 
  AND token = 'gky+Ra8evZFg1zwV9hZvtB+3nJfjfuy6Fh5cJR6dQ5A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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