Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c569961d5f8b1415d3d3ae6896098065c33d7c90f3c86c1f9bdf2d95ada468ca' 
  AND token = '5iY65oN1YZ6/uOdTWFIudrGadS23bIAsYVcPd2pvTdA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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