Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c5a1983775c47e8a58ae70fdbab51f63e125915236082c603e2824f745387c0' 
  AND token = 'wamMtuzWr4BUC7ZIrB+Q41UCvclb2BfRavp0DXzZJ0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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