SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da237b62055f85ae4b0e243f28825bb0885d161b2963bf948c34445015ac79d5' 
  AND token = '84/HXiQnZEZBC3FoGq/mHv9Lly9mzVq1zqamjQ07W8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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