Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c971559597c27c228abb0a87edc508289031726dbcb540e4e179d63968e9fae' 
  AND token = 'WQX/zNACB2nVr/qb90jifDrC4gF44tApB9RB0SofG5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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