Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20f1ca55f8f2af64fa67bfc51ec0229cac5de1eaecc43f89d8685d086906bddb' 
  AND token = '55bki1ITKj9vjWZv9AHe2DfPN5/0grtaU7b6l0cBFoE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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