Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6082a98dc04beb036324f1c9056a32f187e9009232ded53fca52140bddd85827' 
  AND token = 'BPvmYyC9fzNMRhPikjcJkd62dMLxe0cPA/mXdKhzdQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}