Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '080d2d8abdfced7f0c019164a8e838097559825de27b1375b9bb4cb288f608c5' 
  AND token = 'SazCXiVpd4ofBYuV2hmee10e4bLelI8CdqDmn7txPHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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