Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78dde21818075baea2d680af3daa1e2b09606f4126f8993f47b7142158882709' 
  AND token = 'AnzOZYkt4Us+n96wgtXue2ikZR7a7GWDAc4PBIQvBQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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