Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd11e312ddd3b70218e012e8ff38a0856b35c62b9cca2038e6373b99d6ec89a9b' 
  AND token = 'WgOi2hT/n+x5H8nCvIPzfMmlyTz9+N3uOdTstZGmS4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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