Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a178061e64be26b8d72497fb8f8716eaa0eaec3220843d68a91c029bb64ac935' 
  AND token = 'HHXUH9iigi21alYAdTXdQxGyqeuTaVyO6NyoNXCULD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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