Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66c28f6a56796389fd92f3e67cf948ff4a2f7c395b5fc5208ae53c850cc45b7c' 
  AND token = 'WRnLXyTMoOK8dyN/fGjRgs8oiVPpsCPF87jAwwQXUTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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