Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '440f56979e59db8bb2ce9ecfb6d4d915a7ecede32a1b8d92a98475f6ae23d49a' 
  AND token = 'saPN5dFE3yhERSw56u3gJBMUL7mcAUF+e+eLcEkM4eo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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