Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e2f3169368e06c9cd9863ed583fdf97d0521be3d377361ac017cd48267ee25e' 
  AND token = 'nXlymqrpEwemd4meOt1Jdiava1iUqeSgPXS6lkYqOgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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