Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '084c8003db418558763a9c2de9ec7e8e513b0adb9b40847a07a6eb574886a7a6' 
  AND token = 'NkJF5/rUDUGAvo/YKlDMTUkR7iypHLnYQVT7ZywX0tY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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