Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a164019da042d5054937d1e3380540e5bee839a4af0f49ee1759d37bc05b1065' 
  AND token = 'hs3VLvj3USGZVEixKK5rMARJRi8SHG8mBJpF+bWdBds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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