Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a59e6291fcea27579f43e82db1a31b5af81992a39bd8bcd1cdb6a758b8c4c14a' 
  AND token = 'MT95QzZ/RVjyPpcmuDf0u6iQaERfne9B7E2H2qLX8Ro=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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