Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb3117ad3c09b34bfb0435af811adeee611383c9e802da9932bd0b5bca6f4170' 
  AND token = 'KIfIB/rMH96tskXSpYf52FddhMdo9xdTmZGgfKR/ldI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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