SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '65cbeed16014f12bb6172efa1391cacd732c020875774a11f9c6d43be09fc40a' 
  AND token = 'f5HUFhv8i4SAaSBqAoMYUzkWT9WJX7xZNn2dq8gIFls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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