Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd36be7d647680e8f361a64b2af24be5b0597c844f04735c30c153c6d027ac06' 
  AND token = 'RWq5RJllBVoNmfq8/0f0nT/IIxgUibJ4ra88mhMxq9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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