SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9037c5a1a2a75e22f75ad177d1eadd2ec46256f76d28f2d4014d4081b5953b7b' 
  AND token = 'J0lYyjTSOhq3PB/tLdONgFt6x3vuj7jT7l4KpKqnIRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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