Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '359df3336dbd0192bf0ac12a2fe554c851131bf1251fc11b37f7df9b6e730139' 
  AND token = '6CNPXw/q8k278G2fhLzkxnHn1M3o9cI6nB+XtkiDLtg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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