Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85b8c4bf09e23e6a023e6cba9d2ebacf8eac34ad2606b4b8e940566692870242' 
  AND token = '8ApcGgP9jGm6ikJ8bZhmguzE+ETDMJbj67yQILDsg+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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