Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d54de3dca477a326e6643106023f8002a1ddd4324fc67a59c800471ae67792e' 
  AND token = 'oq5/hEHXwhJRa8OwIdXZqNqyI/uHMcu8eG55zNE39w4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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