Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8d7af49a4528e371fde0f81036f6715175711dd28fbd5dcbe608a6a8b5fc7bc2' 
  AND token = '8UoeUkLnLY3VycJpzF6RA++eNX9NgAgno0QEE74/YBQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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