Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d2c1c735d73ea04a3aea6c6cc48e3c59fc25dbc777e5670f45f6f840a5b958f' 
  AND token = 'A/XdNrBDMX0e5euBx7aDstN5jTbERztOm9tQSs+xG9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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