Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '781b4f7fbce41e059c37df98619019b24cdb1e5f5475b4852f0137be15ab8944' 
  AND token = 'Drheia8c9A6IRgfrPVhuYvcjYFtYCAYGd0tgzSDthRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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