Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '184f2b37f63f1e443a84348c349a4e53a25e9a162278eb66ccad8801940f227d' 
  AND token = '2wMH2mVXcmNN9SGc7A+lWn/2ZVlTHREQ+Rwzk2egimM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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