SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64a102df3d110dc69fb5bd163b65494d58c99f7ad2c6c5e2a7a328199bb997e7' 
  AND token = 'vNA3PvnV78JIxcBWYSf8j/iKh6tUq6YXIomwNJFYd6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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