Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1115227b384b662770113ea294b7c53092efa04b812b03034d652eb99793d5ad' 
  AND token = 'bfG/A5dG0r4o4eiqdklgRSViG9Ux7qClBUOFWjAN2qk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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