Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b699ccb8c73c11a468bf7220a6c9c35799fccab7d5ba7ccaa59e1d9bfd648d1' 
  AND token = 'CRaoOQCebA9uWcmX0juR9kG2xtFATcyhokB/UJTnODU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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