Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efb4690bb6b4913a1c550c8938e361513accc6a08278ce45ae1d21d67e0cb0a1' 
  AND token = 'GkkfBfHS/a/+2FCn3b4GA5DeNPoZ3DtqVJy4NqOLrqw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00091

JSON explain

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