SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9081da920ebed11c30b780fae724ab3e153f69f70b12b36928f0394b7acf5e77' 
  AND token = 'IYsqejJsusc77ylgzWOquacT5aZ/X7V6BaPdiC3//Kc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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