Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e65ab001f69ad8b11b6b8ba6f2eb54154c3af323d7e2c5b2460876b828b21c25' 
  AND token = 'wEMWR3+ROZq6AfCD5rTq/nlKlPDLTTUyrNg6ePoVTqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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