Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a76a3071373a421f753c89269d2aa96b2a013538a538ac8740bf76e82d8a6e1' 
  AND token = '5wOS9bgwiTmeqTjXGfV1udeHbVF+BmnBytKR12URb9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}