SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '49a0b550d9c2914f4625c44186f96a2870336b0a1e5de32864890af12bb856f7' 
  AND token = 'aTeCR+K9/n7qecRkMZm7EIG9LJurz7sbsUJORh8P28M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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