Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49265e7056dd623c0ee20f73dd1696f110b3f7d58b04a60387a4eed28d757bb7' 
  AND token = 'MG/fD75b57rKEx3T6a33yAhzoqF6D+sFpHFrz3tKmMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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