Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '248443653084e286800367d4726e22736d9fd97d0c058e26b3990643e039db47' 
  AND token = 'cqvjpyBqrE9lPE4cntymwCxUZzpY5o4Bz+cDBU/pL9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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