Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cf92be55a9baf82d340f1f0dd42669a2cfb684ea05f738dea14ff2cd2e3e66f' 
  AND token = 'agmMhcSCI08UgKMPcXnOy9bd9oT2DwEVWPogWBmBGGU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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