SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6ee1b4b8ca39ae6e45892a737a532ffb42368a77911579ea5437776784ba7396' 
  AND token = '1BSoed/o8fzKK2vLdbPJXALgzkBn/KJzHZYnKzlrxnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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