Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2107e66d0133febf9765012cea8ba83a7fcf2661ed2475619faa94bdf4f6aa00' 
  AND token = 'TjHI6Ut7Vo0uY7hQKTpMuR4DvRyhu7ngF6CJd14FbfU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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