Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7804b6f2a30c163edb86ee739d74e13189a4238c6117cd238bd2cbaee35cac7' 
  AND token = '0N55ha2cVFwseQm+1DGVDh4pxiof2SFk5IHz51Qb6Kc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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