Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28dd7de7e6ce5b7f7c3c3a8e7b9e16a47196ef8221dbe9816d34fc6b26074950' 
  AND token = '++Bpmh/RL1n6oEOhr+jCNP7djwnbatUBfTFYvb8lFdc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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