Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e3821f481da3ec6a4f05932e21d35a21c42dcabdcdb846d6b730917ecaea0a30' 
  AND token = '/KBOWIR7EYA41xM4DH34h6lcSlch/PYS1pMkX0USGgw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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