Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8e99165c9033da6c8560572b7f7d85b508c743e4f1a82d69805998c5145ead4' 
  AND token = 'wkVdkWNqilvbGQsOp0gV9jo4hNvDeQO74FmsUb/tUh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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