Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f53ed1840b0685d63949f9d09c1b035d785dceee24cf1447f6afc12436f79796' 
  AND token = 'SrmC5G9nnZamgHXMhyC9Hlk7/LPE30y3VfSB0mdUOHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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