Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ac1460510917977313825efcf4ebac91a6fe71c7dc99e86223790bd52be82f0f' 
  AND token = '2hXEprMEv2/mNPmATdzHvkk9GwNS9a1mNf28ELeb8zg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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