SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '73a7668b65192d9d6987d7b43076e8906d22e3b94d5eb3cc2df1827a62c5115e' 
  AND token = 'HVLXPQ7J5KqJRwPFFU3wB6tBTUz1wGW7ea+wMolgvn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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