Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e1c51bf207f12b56f14cfa79aaeb4f372388e97ed4a5c0935106696b5f6a96c' 
  AND token = 'fyP1apeys4uUSLKwKQ9sVSFOp9iIR1bOAR6/KeDEpi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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