SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1804e2082a6b94d53e99f9b074ea345a0c08e2db68d52248a9c79d833ea5a315' 
  AND token = 'TLYSpE8ExjK6BQBCe6egw+v5BHiRjYwhbC2OK1zWQFc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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