Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd66123934766898b70b30d7fe0b71cae52a882bd62d4b81ff16eb41561d676be' 
  AND token = 'nSPfI94CBf4MZvyVI7GBsAIKo1AjXMKL/Prvoky2J6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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