Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a9b0afda736ea833b88f756647732f9321df5556ae12082e787cf4ca85772e24' 
  AND token = 'hCgHUMX5VUpyF2z+iSbjQYX665cy7KEL9C603/7OaEU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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