SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '438414d05944c1a98fcdc480c35f81b793452c47b938b555ebb31991938463e8' 
  AND token = 'K+Nol9rxRBT0+690+jjhaXpG1Pz8hiYzAtXnl/DuBLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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