SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02f0f019a293887610985f98d9173d1c36b935563a8fbde8c93aefcd6451a296' 
  AND token = 'dU4fFnviAZonu4jbOF+rvs33Ygq7/D3JB28Rbw/iYiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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