SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '84cb527cf380cd1a690a2716b1a9e375e9a82954faf4b7f1c753362e689107bd' 
  AND token = 'vHcwGwJaDtz4rEUxfbchHZeus0L0kqb9VEk4qG8QzXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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