Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd56a33d26f99038db6b38d653967df62ee4a645514889990965da91b169a703' 
  AND token = 'DsSLCRHFnXIUuC4AtbvzcfWNFvaDc5V/vbG3+hPq9VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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