Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '600193e3e712bcef0b1b9170249713b968b331861269fe084fc070e3818ac496' 
  AND token = 'vQm3iKGSgxVgCw4OSdMSDr/GtdPZ5+ure6frHitX6Qc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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