Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf197e3a82d4a2402e99bf95a4a5ee5225cb67ff804ebe757c057baf4101bce5' 
  AND token = 'jmAQ8l3f0cHEYSlWvOItBgbNhWCxSdH08tKq0yVk6+Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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