SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '634008177b9ce4c5124a3c664a8ee5eb182e7637c2c5195f962d3e5f108bf864' 
  AND token = 'NY1sKvzJCZvW3Uo8pe4GWlZqmnicJ98GJwXOp24JJqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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