Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf8822693b06eca3080df5bb15d71e5eb3e4a0cd9c6b6d91d3aa7d09c407cc0e' 
  AND token = 'Yc2ApuS9nR5H6a0IW0jceBrFRdAgQj5dOng+ufEyZcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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