Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c172d069376278918559dd51083d4debface3b0a0409f86f4e6922e3cb0189ea' 
  AND token = '3LPDsEoTEWLew+3/KN5iqXSgmy9A5Zow/wqvGyW/EdQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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