Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f48ae3d625ae0dba8a1e7fd584133399c04e09a93fab53a7dcc8b7a53efe4259' 
  AND token = 'T6vPiNKZ1Cc2+rkCc9e2itC9x9mAN+i266H9jTwkxBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00063

JSON explain

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