Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cef545b0c0e6703b71a34f23e990436282707d2eda4d038e00b5f275c96dc06e' 
  AND token = 'i8AngJHtR53r9Am8dAMMfKpWegfV755HDkf2eywgGFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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