Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62c52752b04f63e9fce4564a29aa86be76fcdcc486c6d4844e733c5b56c350a9' 
  AND token = 'CqbpktikfFsEUuynKYQYbrRJBWf2Ij7q0sKb9ihLXJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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