Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ed70ec3de952f3e250e1756f2f922aa226d3d5b4de306c2dcad5056cbece9f9' 
  AND token = 'vCiOYgAuTzwpM1NBA9gpl3QMZJ2KpfHSZscn64dDFSY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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