Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd08e1cdd207e9253c4b07e4d8b6fa0b4e778360dbc278bd6de17bce6aa78597' 
  AND token = 'xBEmBrmnDFuuoyqq3Lsvw9yOOz2qwE135iBmfOZksMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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