SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0d72726357627e1795db47bbdda1d8099d37d03f1d8261663fc108d068bd1e21' 
  AND token = 'j9w5b4BCGJXJlFYlBtrpXb+exya2gKsO/Qx+T0EygvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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