Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e1ad204890f0691fd3fb743047491569541d8c39079c96cbf352dae5061da02' 
  AND token = '/sCg6db0rC1NK1WahafxMPiA0ygV7d9UlINaaVQ5HXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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