Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37fbb61c28b4b88f266ed1f1ae00681dc19b820032e7b50f6655b34bb7b1ca89' 
  AND token = 'asWwUMOF5FzxxP3z5yVjxEothE3OL6Izo5kH2P++zzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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