Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f361e78b16179f824180cfe5de402ef00887ec71983b170bd3a556f6c0c7de41' 
  AND token = '/HNHRGje6MKDxEx4BZQphFdk81jjGqe4g65DS26B7OU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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